/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.hadoop.hive.ql.parse.rewrite.sql;

import org.apache.hadoop.hive.conf.HiveConf;
import org.apache.hadoop.hive.ql.io.AcidUtils;
import org.apache.hadoop.hive.ql.metadata.Table;

public class SqlGeneratorFactory {
  public static final String DELETE_PREFIX = "__d__";
  public static final String TARGET_PREFIX = "t__";
  public static final String SUB_QUERY_ALIAS = "s";

  private final Table targetTable;
  private final String targetTableFullName;
  private final HiveConf conf;
  private final String subQueryAlias;
  private final String deletePrefix;

  public SqlGeneratorFactory(
      Table targetTable, String targetTableFullName, HiveConf conf, String subQueryAlias, String deletePrefix) {
    this.targetTable = targetTable;
    this.targetTableFullName = targetTableFullName;
    this.conf = conf;
    this.subQueryAlias = subQueryAlias;
    this.deletePrefix = deletePrefix;
  }

  public MultiInsertSqlGenerator createSqlGenerator() {
    boolean nonNativeAcid = AcidUtils.isNonNativeAcidTable(targetTable);
    return nonNativeAcid ? new NonNativeAcidMultiInsertSqlGenerator(targetTable, targetTableFullName, conf, subQueryAlias, deletePrefix) :
        new NativeAcidMultiInsertSqlGenerator(targetTable, targetTableFullName, conf, subQueryAlias);
  }
}
